Hold which key to enter bios toshiba satellite

Normally when you power on your Toshiba Satellite laptop it attempts to boot the operating system installed on its hard drive.
In some instances you may want to boot the Satellite laptop from a different device, such as an operating system installation CD or a USB drive.
The boot order doesn't have to permanently be set to the hard drive.
It's possible to access the boot order before the operating system loads and change which device is set to boot first.

Turn off the Toshiba Satellite laptop.
Turn it back on immediately and wait for the "press the F2 key to enter Setup" entry to show up on the screen.
Press the "F2" key to access the Toshiba Satellite's BIOS menu.
Use the right arrow key to navigate to the BIOS tab labeled "Boot."

Scroll down to the option labeled "Boot Priority" and tap Enter.
Check through the list of devices and locate the specific device you want to use to Boot your Toshiba laptop, such as "CD-ROM," "USB" or "LAN."

Highlight the name of the device in the list and then tap Enter to make it the top boot priority.
Use the right arrow key again to scroll over to the "Exit" BIOS menu.

Tap the down arrow key to highlight the "Save and Exit" option.
Press Enter to save the new boot order and restart your Toshiba Satellite laptop.

Repeat the procedure when you want to change the boot order back to its original setting.
How to boot your Toshiba PC from CD-ROM, LAN, or diskette
http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/bulletin.jsp?soid=403623
Toshiba support
http://askiris.toshiba.com/ToshibaSupportSite/search.do?cmd=displayKC&docType=ex&bbid=bb42&url=&dialogID=111194172&stateId=1%200%20111190763

Hold down the F1 key, then, while continuing to hold it down, press the power switch. the system will turn on, then prompt you to check system and press F2 (thats from memory, it maybe F1 again) to enter BIOS.
With many Toshibas you can hold down any key to do this, as it simply generates a keyboard error, prompting the same message.
Hope this info helps.

Restart your computer
During the boot process you will see on the screen to press a certain key to enter setup usually the Delete or F2 key
this will vary depending on your computer and operating system

Press and hold that key during the boot up process to enter BIOS using the arrow keys load failsafe defaults or load optimized defaults press escape then press f10 to save to cmos to restart

hope it helps

I beleive if you hold f12 during start up it will give you the option.

Press the F8 key during boot up.

F2 key method Turn the computer on. If you see an invitation to press the F2 key to enter Setup, do so. The Setup screen will appear.
Toshiba Hardware utility method Run the Toshiba Hardware utility from the Toshiba Console. It may also accessible (as 'HWSetup') from the Windows Control Panel. Changes to some of the settings will require re-starting the computer. This method is the only way to access the BIOS settings on some notebook PCs (Satellite 5000 series, for example). (For these machines, pressing and holding the F12 key immediately after powering-on the notebook will allow you to alter the notebook's boot priority.)

If the Toshiba Hardware utility is not present, try the F2 key method and the Esc key method (see below). The Toshiba Hardware utility may be downloaded from the Toshiba support website at //support.toshiba.com
If the computer is fully off, and/or to avoid having to re-start it (and Windows), use one or the other of the following two methods. The PC will have to be truly off (not suspended, or in standby mode, or in hibernation mode). If an external keyboard is attached to the notebook (either directly or via a docking station or a port-replicator), disconnect it until you have completed this procedure.
Esc key method Turn the computer on. If you do not see a prompt to press the F2 key, then immediately press and hold the Esc key for three seconds, and then release it. When prompted to, press the F1 key. The Setup screen will appear.

Turn the computer off.
Hold down _ANY_ key, and keep it held down.
Turn the computer on.
When you see the "keyboard error, press BLAH to enter BIOS setup", just press the 'BLAH' key.

Or:
turn the computer off.
Turn the computer on.
Try repeatedly-pressing DEL or F1 or ENTER or F2 or F10, as soon as you've turned it on.

Try this...

Toshiba® 335 CDS ESC Toshiba Protege ESC Toshiba Satellite 205 CDS F1 Toshiba Tecra ESC then F1 or F2 Toshiba Notebook [Newer models]
1. Turn on computer by Holding down power button while pressing the ESC key.
The machine will beep, then display:
Check System, then press [F1] key.
2. Release ESC key
3. Press F1 key

I think in all bios at boot start up you press delete

There is 2 way to enter, you can use Toshiba HW setup for BIOS setting from windows. Alternately you can hit ESC several times after turn on the computer and hit F1
Good Luck